The normal length dep silencer is a good length. The shorty will have a bit more torque down low but will have less overrev. You will have to shift more with a short silencer.

@@MatthiasVermeersch is it worth getting the exspansion chamber aswell or just silencer was looking at pc 304 but can get a full dep system for 350£

Get the dep expansion chamber also. I had a pro circuit and sold it. The power was not lineair and bike was not easy to ride. Now i run a HGS pipe with a DEP silencer. HGS has a wider powerband but a bit less overrev compared to the DEP pipe.

@@MatthiasVermeersch okay mate thanks for reply have a 2023 yz250 will get full dep do you change jetting much as i will be running at 32:1

@@OwenLee424 i never rode with the stock jetting. I ride with a 185-188-190 main jet depending on what track and weather. Pilot jet 55. Stock needle clip 3 or 4

45-50km/u

danku@@MatthiasVermeersch

I had no video edit program on my pc. You can read everything in the topic on vitalmx www.vitalmx.com/forums/Bike-Builds,46/A-new-YZ250-build,1359102

@@MatthiasVermeersch You could put the torque and HP peaks/RPM in your comments. 🙂

Why do you think that? I haven't raced a 4 stroke in almost 10 years..

@@MatthiasVermeersch awesome I don’t like 4 strokes. Ask Ryan Dungey about me smoking him on my 07 KTM 250SX he blew his Pro Circuit engine within 5 laps after I shattered both my legs racing motocross.

I didn't have a video edit program on my pc. you can read the build topic on vital mx...

@@MatthiasVermeersch Fair enough, but posting them in the "Description" section below the title would have been good 🙂

you can read everything here: www.vitalmx.com/forums/Bike-Builds,46/A-new-YZ250-build,1359102

bought it second hand, but you can buy them almost everywhere.. in the usa they are sold as BUD HGS

It's easier to handle with the heavier flywheel. Less wheelspin and the power is more spread. I've heard that the 11oz feel the same as the gytr 8.4oz because it's on a different place on the crank. I also like the gytr more because it's 1 solid piece. The tmv you bolt on the crank and could come loose easier... the gytr 8.4 is perfect for motocross

Thanks a lot.That is the answer i was searching for.Absolute straight and helpful.No more questions.Thats the way it should be.I appreciate your help and always have a good ride.Thank you!!!!

No running same jetting as with the OEM pipe. Main jet 185(summer) 190(winter) idle jet 55, OEM needle

@@MatthiasVermeersch cool thank you matthias.

Yes i left the spacer in. There are dyno results with and without the spacer. Without the spacer you loose 1 hp over the whole curve. You can find it somewhere on thumpertalk

@@MatthiasVermeersch cool, thanks matthias, I've just fitted my v force looking forward to testing it this weekend now, tempted to put a dep system on as it's stock at the moment, I'd there much improvement over stock?

@@jdc9128 torque will be about the same but you will have a wider powerband and much more overrev. You can read everything on vitalmx. Hgs pipe gives more torque than the dep but a bit less overrev. www.vitalmx.com/forums/Bike-Builds,46/A-new-YZ250-build,1359102?exclusive_forum_user=false&page=1

@@MatthiasVermeersch just rode with the v force installed, can't belive the difference, bike is super snappy and responsive, not sure if I prefer stock reeds, especially when you get tired the bike becomes difficult to control.

@@jdc9128 What else is changed on your bike? You could try a 48 or 49 rear sprocket maybe?

+-51.5 hp, you can read everything about my bike here: www.vitalmx.com/forums/Bike-Builds,46/A-new-YZ250-build,1359102?exclusive_forum_user=false&page=1

I have a picture of the dyno curve, I forgot to put it into the movie. The bike has +-51.5 hp and has a bit less torque with the DEP compared to the HGS pipe but more overrev with the DEP

Awesome what gas are you running

@@tannerstull1393 normal E5 98 octane mixed with motul 800 1/36

@@MatthiasVermeersch so 51.5 from the engine or?

@@clawsss on the rear wheel. Ecomaxx/VHM gets +-60hp out of a ktm sx250..